/Engine/Source/Runtime/UMG/Public/Slate/WidgetRenderer.h
void DrawWidget ( [FRenderTarget](API\Runtime\Engine\FRenderTarget) * RenderTarget, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & Widget, FVector2D DrawSize, float DeltaTime, bool bDeferRenderTargetUpdate )